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Kevin Guskiewicz, one of the winners of the MacArthur Foundation award announced Tuesday, was long a thorn in the side of the National Football League. Since 1999, he has wired the helmets of about 700 college football players with accelerometers to study what kinds of hits result in concussions, which kinds of players get them, and what the long-term consequences of those brain injuries can be. He was among the first to find a strong link between multiple concussions and later dementia, depression and memory and intellectual deficits that often lead to Alzheimer’s disease. When a 2005 report prepared for the NFL asserted that a player who had sustained a concussion could safely be...

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Kevin Guskiewicz, one of the winners of the MacArthur Foundation award announced Tuesday, was long a thorn in the side of the National Football League.
Since 1999, he has wired the helmets of about 700 college football players with accelerometers to...

We've long been told to keep an eye on our moles lest they progress to melanoma, a form of skin cancer that's treatable if caught early, deadly if not. But not all moles are equal -- some are risky; others can be safely left alone. The biological roots of...